Add readme

README.md

+# NumPy - A to Z
+
+This repository provides Jupyter Notebooks and other information to provide
+an overview of the NumPy python library. The information covers concepts for
+beginners like why you should use NumPy to advanced concepts and usages.
+
+To use these lessons interactively:
+
+1. Clone the repository.
+2. Download and install the Anaconda python distribution.
+3. Run `jupyter lab` in the root directory of the repository.
+4. From the file browser on the left of the JupyterLab interface, open the
+   notebooks in this repository one at a time and step through the
+   instructions.
+